Rotary rock-cutter.



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J. W. COOK.

ROTARY ROCK CUTTER.

APPLICATION FILED APR. 3, 1913.

1,083,666. Patented Jan. 6,191.4.

3 SHEETS-SHEET 1.'

Qw Lt'l mooao attozneag J. W. COOK.

ROTARY ROCK CUTTER.

APPLICATION FILED APR. s, 1913.

1,088,666, Patented Jan. 6, 1914.

3 SHEBTSSHEET 2.

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eltfozuu COLUMBIA PLANOGRAPH CO.,WI\SHINGTON, b, c,

J. W. (300K.v

ROTARY ROCK CUTTER.

APPLICATION FILED APR. a, 1913.

1,083,666, Patented Jan. 6, 1914.

3 SHEBTSSHEBT 3.

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UNTTED STATE FATENT @FFTQFL.

JOHN W. COOK, OF MIAMI, FLORIDA, ASSIGNOR 0F ONE-THIRD TO GEORGE A.WALDECK, OF MIAMI, FLORIDA.

ROTARY ROCK-CUTTER.

rosaeee.

Specification of Letters Patent.

Patented J an. 6, 1914.

To all whom it may concern:

Be it known that I, J oI-IN W. Coon, a citi- Zen of the United States,residing at Miami, in the county of Dade and State of Florida, haveinvented certain new and useful Tmprovements in Rotary Rock-Cutters; andI do hereby declare the following to be a full. clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention has for its object the provision of a rotary rock cuttercomprising a plurality of cutting tools having a combined reciprocatoryand rotary movement.

Another object of the invention is the pros vision of a simple andeflicient means for accomplishing the compound movement of the cuttingtools.

Another object is to regulate the speed of the respective movements toafford the maximum cutting efficiency.

In the accompanying drawings, Figure 1 represents a sectional viewthrough my improved rock cutter, the section being indicated by the line1-1 of Fig. 2. Fig. 2 is a bottom plan view of the cutter. Fig. 3 is aplan view of a split collar used in connection with the cutter. Fig. 4is a fragmentary detail view of a cuttter head, tool and cutter blade.Fig. 5 is a sectional view through a modified form of the invention.Fig. 6 is a sectional view taken at right angles to Fig. 5. Fig. 7 is aplan view of one of the links for connecting certain parts of thecutter. Fig. 8 is a further modified form of the cutter, partly insection. Fig. 9 is a sectional view on the line 9-9 of Fig. 8, and, Fig.10 is a sectional view on the line 10-10 of Fig. 8.

Referring to the drawings, the numeral 1 indicates a cutter head keyedupon the main shaft 2 and carrying upon its lower face a plurality ofradially arranged cutter blades 8. The shaft 2 is adapted to besupported by any desired form of frame (not shown) and the gear 4thereon is adapted to be connected with a suitable source of power. Thecutter head 1 is of a solid circular formation having a flat upper faceand a tapered or conical lower face, over which are secured the cutterblades 8, by means of bolts or the like.

Loosely mounted over the shaft 2, above the cutter head 1, is a toolholder 6 having a hub 7 The under face of the tool holder is providedwith a plurality of depending ears 8 carrying the pivoted cutting toolsor chisels 9 engaging through openings 10 in the cutter head 1. Thecutting tools 9 vary in length, those nearer the outer edge of the toolholder 6 being of less length than those adjacent the shaft 3, so thatthe points thereof correspond to the inclination of the bottom face ofthe cutter head 1. The hub 7 is channeled at 11 to provide a seat forthe split collar 12, which is rotatably mounted therein. A crank 13 of asecond or auxiliary shaft 14 is connected to the split ring 12 by theconnecting rod 15 having a lower yoked end provided with openingsthrough which are engaged the pins 16 carried by the split collar 12.

The main shaft 2 of the cutter is adapted to be rotated at substantiallyslow speed so as to move the cutting tools 9 in a circular path. Theauxiliary shaft 14 is adapted to be driven at an increased speed tocause the cutting tools 9' to be reciprocated quickly, it beingunderstood that the collar 12 with which the crank 13 is connected isrotatable in the hub of the tool holder 6.

In the modification of my invention disclosed in Figs. 5 to 7, thecutting tools 17 are mounted through a cylinder 18 and work againstcutter blades 19. Heads 20 are bolted or otherwise fixed in the ends ofthe cylinder 18 and are centrally apertured to receive the shaft 21,which is rotatable therein. Inside of the cylinder 18 an eccentricallymounted sleeve 22 is fixed to the shaft 21 and is provided with aplurality of concentric rings 23 connected with the cutting tools 17 bythe links 24. The shaft 21 is adapted to be driven by the drive shaft 25by a pair of beveled gears interposed therebetween. The cylinder 18 isdriven from the same drive shaft 25 through a second beveled gearmounted on said shaft and engaging a large beveled gear fixed to theadjacent head 20.

In the second modification of my invention the cut-ting tools 26 are allof the same length, and work through a cutter head 27, similar to theone disclosed in Figs. 1 to 4, but having a hub portion 28, over whichis journaled the tool holder 29. The face of the tool holder 29,carrying the cutting tools 26, is shaped in conformity to the outer faceof the cutter head 27 A hub 30 is formed on the holder 29 and ischanneled to receive the lid split ring 31 havingpins 32' thereon carry-'ble cutter head and tool holder, cutting tools ing connecting rods 33mounted at their pivoted to said tool holder and projecting upper endsover the cranksin a crank shaft" through said cutter head, and cuttingblades 15 34. The main shaft 35, to which is keyed secured to saidcutter head.

5 the cutter head 27 is mounted in a suitable In testimony whereof Ihave signed my frame 36, which also carries the crank shaft name'to thisspecification in the presence of 34. The main shaft 35 is adapted to becon- 1 two subscribing witnesses. nected to any suitable source ofpower' and 2 drives the crank 34 through the medium of JOHN COOK 1 atrain of gears 37. 1 Witnesses:

Vhat I claim is: GEO. W. WALDEOK A rotary rock cutter comprising arotata- MARY A.v NALL..

Copies of this patent may lie obtained for five cents each; Byaddressihg'the "Commissioner of Patents Washing-ten; D; G.

